Swage shaper



Aug. 7, 192 8.

J. F. PRIBNOW SWAGE SHAPER Filed July 51, 1924 2 Sheets-Sheet 1 INVENTOR. Jimv fPwBlvom BY W ATTORNEY.

Aug. 7, 1928. 1,680,256

J. F. PRIBNOW SWAGE SHAPER V Filed July 51, 1924 2 Sheets-Sheet 2 g m INVENTOR.

.j/m f/ n/blvo'ng BY ATTORNEY.

. 8-8 of Fig. 2.

- flanges 13 have transverse slots 16,

Patented Aug. 7:, 19 28.

stars-s e JOHN F. rananow, For INDIANAPOLIS, INDIANA, essrenoa 'ro n. e. ATKINS & GOM- PANY, OF INDIANAPOLIS, INDIANA,

A CORPORATION OF INDIANA.

SWAGE SHAPER.

Application filed July 31, 1924. Serial No. 729,214.

It is the object of my invention to produce an improved saw shaper, which can be operated with a minimum of labor, can have its parts put in place or taken out with little effort and without disturbing other parts,

"can be readily adjusted by simple means to limit the closing movement of the shaper jaws, operates to move both jaws in the shaper body and to do soby a simple mechanism by a single operating arm, and has effective and readily adjustable and inter changeable positioning means for locating the shaperin proper position on the saw teeth.-

I accomplish these results by the shaper construction illustrated in the accompanying drawings, which show a preferred embodiment of myinvention. y

In such drawings, Fig. 1 is a perspective view of a shaper embodying my invention, in position on a fragment of a saw; Fig. 2 is alongitudinal central section through such shaper, on the line 2-2 of Fig. 5; Fig. 3 is a perspective view of the shaper body; Fig. 1 isan oblique section substantially on the line 41--4t of Fig. 2, but with thesaw shownin full, and with the toothstop removed; Fig. 5 is a'transverse section substantially on the line 55 of Fig. 2;

, Fig. 6 is a transverse sectionon the line 6%6 of Fig. 4; Fig. 7 is an enlarged fragmental plan view of the overlapping portions of the tooth-stop and positioning plate, with fragments of the shaperjaws' below; and Fig. 8 is atransverse section on the line The shaper body 10has an oblique-topped central longitudinal groovell open at the bottom to permit the shaper bodyto be set astride a saw 12. Two horizontalflanges 13 project oppositely from the body'10,,

away from the slot 11, to constitute supporting abutments for the upper faces of the jaw carriers 14 and the shaper. jaws 15 carried thereby. Near their rear ends, the desirably open to the outer edges of such flanges, for

receiving shouldered pivot bolts 17 by which the jaw carriers are pivotally supported at their rear ends from the flanges 13. By having the slots 16 open at their outer ends, either jaw carrier with its shaper jaw can readily be removed, without disturbing the other parts.

Each shaper jaw15 lies against the inner the other left-handed,

face of its jaw carrier 14., with its lower face resting on a narrow shoulder flange 18 provided on the jaw carrier for positioning the jaw; and is held firmly against the jaw carrier by a clamping bolt 19 projecting into a threaded transverse hole in the jaw through a longitudinal slot 20 provided in the jaw carrier and opening to the forward end thereof. By loosening the clamping bolt 19, the jaw may be adjusted longitudinally of the jaw carrier by an adjusting screw 21 extending longitudinally of said jaw carrier from the rear thereof into engagement with the clamping bolt 19. The open slot 20 permits the ready removal of a jaw from its jaw carrier,'and the association of the jaw with the jaw carrier in four different positions of the former, so that any of the four oblique working faces 22 of the jaw may be made the operative face.

The forward ends of the shaper jaws 15 rest slidingly on shelves 24 of the shaper body, 10, and may be moved toward each other by operating screws 25 mounted in transverse threaded holes 26 in such shaper body. One screw 25 is right-handed and so that their adjacent endsapproach each other by the turning of the two screws :in the same direction. To minimize friction, the adjacent ends of the screws 25 are counterbored to receive hardened-steelpins 27, which project beyond the ends of the screws and bear against the adjacent faces of the jaws 15. The pins 27 desirably have reduced bearingsurfaces at 4 their ends within the screws 25. for reducing friction, as by having those ends rounded oif hem-ispherically; and these reduced ends may bear against blocks 28 set in the bottoms of the holes in the screws 25. By this arrange ment, as the pressure increases between the pins. 27 and the jaws 15, the pins 27 may stop turning while the screws 25 proper still con tinue to be turned; which reduces friction between the pins and the j aws, and so lessens labor. 7

The outer ends of the screws 25 have operating arms 30 and 31 suitably attached thereto; as by tapered mountings 32. The two arms 30 and 31 are separate, so that they may move relatively to each other parallel to the axis of the screws 25. They are arranged to be rotated together, however, while permitting said relative axial movement. To this end, the arm 30 extends over Ill) the body rather past the middle thereof,

and is there provided with an open-ended slot 33 which receives a projecting finger 3 1 81. The

from the incurving end of the arm arm 30 is provided with a projecting operat- 7 each other as the screws turn to advance the arm 30, is provided mounted adjusted position by received in downwardly opening from the plane of the toward or recede.

saw 12. This tongue-and-groove-connection 333 1 permits either arm or 31 to be removed without disturbing the other, and without requiring the release of any locking means between the two arms; which facilitates the removal and replacement of the screws 25 and the removal and replacement of the pins27 in such screws. I i 1 One of the arms 30 and 31, and desirably the handle 35 branches stop-screw 36, arranged in position to engage the top of the shaper body 10 (or some part rigid therewith) and thus to'limit the saw-approaching movement of the two screws 25. The stop-screw 36 may be adjusted to suit conditions, and locked into a suitable lock-nut 37. To set'the shaper in proper position with respect to the saw tooth being operated on, I provide a tooth-stop 10, which is desirably reversible end-for-end, with the two ends. differently shaped if desired. Each endrof this tooth-stop is shaped, however, to fit between the working ends of the two shaper jaws 15, and fitting upon the point of the tooth to'be shaped, to locate such tooth in desired rela-' tion to such'jaws. This tooth-stop 10' is supported by a transverse clamping bolt 42 slots 13 in downwardly projecting flanges located on the two sides of the tooth-stop 10 and profrom a stop-support 4A 'adjustably jecting upon the top of the shaper body 10, The stop-support 14, tending adjustingscrews 45 which bear upon theupper face of the tooth-stop 10 on opposite sides of the clamping bolt 42 which supports said tooth-stop; so that by adjusting said screws 45 it is possible to adjust both the height and the angle of the toothstop with respectto the shaper body 10. By this adjustment, the tooth-stop may be made 'to fit different shapes of teeth; and the teeth may be made to co-operate with different parts of the operative surfacesof the jaws to produce more uniform wear.

, The stop-support 1 1 lies upon the shaper body 10, and is'clamped thereto by a clamping screw 46. Such clamping. screw extends through a longitudinal slot 17 in the 'end of the tooth-stop near the point where therefrom with a the shaper has a stop-notch ll for has downwardly eX' all tightened,

supporting end of the stop-support'4:4 to permit longitudinal adjustment of said stopsupport and the tooth-stop carried thereby withrespect to the shaper body 10. 'This adjustment may be set exactly by anadjust-V ing screw 1-8, which also serves to prevent the stop-support 44: from slipping on the shaper body r10-under the stress of use.

To assist in holding the shaper body 1O in proper'positionon: the saw, and-to facilitate shifting the shaper from one sawtooth to the nextwithout danger of having. the teethcatch on the point of the tooth-stop, I provide a positioning plate'50, which pro jects into the slot 11 from the rear. The forward end of the positioning plate 5OIis desirably transversely chamtered at thetop, so that it .may smoothly 10, as'is clear from Figs. 2=and 7a This permits sliding the shaper along the saw from oneftooth to the next without having the teeth catch on the point of the toothstop. The positioning plate is ofproper width to fit rather snugly in the slot 11. Theforward end of the positioning plate'inay be clamped in adjusted'position by a set-screw 51 projecting against its edge through the side of the shaper body 10. The upper face of the rear end of the positioning plate 50b ears against a transverse abutment bolt 52 adjustable in vertical slots in depending flanges 53 of a saw-guide 54: supported from the shaper body 10 and projectingrearward therefrom.- The twodepending flanges 53 approach each other at their lower ends, to co-operate loosely with the side face of the saw to guide forwardly projecting supporting finger 55 by which it is attached to the top of the shaper'body bya clamping 'screw56. The

stop-screw 36" may directly abut against this" supporting finger55. V

The shaper may be operated very rapidly; It is set on the saw as indicated inFigs. 1 and 2, l the inner end ofth'e tooth-stop 4:0. The tooth-stop'is properly adjusted by thescrews 45 and 48 to hold the 'sawtoothbeing oper ated on'in desired relation to the shaper jaws 15, which in turn have been properly radjusted to their desired positions in the jaw carriers l l'by" adjustment of the screws 21 The positioning plate 50 is also adjusted to, desired positiomwith its forward end underlying the rear end of the tooth-stop, and is clamped in adjusted position by the screws 51 and 52 Thestop-screw 3,6 is set properly to limit the swinging movement of the handle 35. I

When these adjustments have been properly made, and the various clamping screws the shaper is set successively on the different teeth of the saw, and at each tooth the handle is swung clockwise (Figs.

thereon. The saw guide has with a sawtooth in" the n'oteh 11 in 1 and 2) as far as-the stop screw 36 permits.

This turns the screws to approach each other, and thus forces the working end of the jaws 15 toward each other to shape the sides of the tooth being operated on. As soon as the stop-screw 3'6'strikes the shaper body (or the finger 55'), the handle may be swung back to release the shaper; whereupon the shaper is next tooth, and the operation repeated. As the shaper is shifted from one tooth to the neXt, the positioning plate effectively prevents the teeth from catchineion the point of the tooth-stop. All this may be done very rapidly, and with relatively easy labor.

The saw guide 5 lserves as a convenient grip by which the shaper may be slid along the saw from tooth to tooth, and also effectively protects the operators hands from the saw teeth.

I claim as my invention:

1. In a saw shaper, the combination of a shaper body, a pair of shaper jaws mounted therein and movable relatively to each other into and out of engagement with the sides of the saw tooth which is to be shaped, a. screw for producing such relative movement, and a thrust pin rotatably mounted in said screw and acting on a shaper aw.

2. In a saw shaper, the combination set orth in claim 1, with the addition that said pin has a friction-reducing thrust bearing in said screw.

3. In a saw shaper, the combination of a shaper body, a pair of shaper jaws movably mounted in said body and movable relatively to each other into and out of engagement with the sides of the saw tooth which is to be shaped, a screw for each jaw for moving it in said body, and a. thrust pin rotatably mounted in each screw and acting on the associated shaper jaw.

7 4c. In a saw shaper, the combination set forth in claim 3, with the addition that each thrust pin has a. friction-reducing thrust bearing in its screw. a

5. In a saw shaper, the combination of a shaper body, a pair of shaperjaws movably mounted in said body and movable relatively to each other, a pair of screws of opposite pitch for moving the two jaws in said body,and operating arms for the respective screws, said two operating arms having portions which project toward each other and interengage with a tongue-and-slot connection, one of said arms including an operating handle.

6. In a saw shaper, the combination of a shaper body, a. pair of shaper jaws mounted therein and movable relatively to each other, a tooth-stop mounted on said shaper body, and apositioning plate co-operating with said tooth-stop to prevent teeth of the saw from catching on the point of the tooth-stop shifted forward to the when the shaper is being shifted from one saw tooth to another, said positioning plate being vertically adjustable relative to said shaper body and to said tooth step.

In a saw shaper, the combination of a shaper body, a pair of shaper jaws mounted therein and movable relatively to each other, a tooth-stop mounted on said shaper body, and a positioning plate mounted in said shaper body across the saw plane in position to engage a plurality of saw teeth, said positioning plate being vertically adjustable relative to said shaper body and to said tooth stop.

8. In a saw shaper, the combination of a shaper body, a pair of shaper jaws mounted therein and movable relatively to each other, a tooth-stop mounted on said shaper body, a. saw-guide projecting rearward from the shaper body and having depending flanges for projecting down at the sides of the saw, and a positioning plate mounted between said flanges and co-operating with said tooth-stop.

9. In a saw shaper, the combination of a shaper body, a. pair of shaper jaws mounted therein and movable relatively to each other, a stop-support mounted on and projecting forward from said shaper body, and a tooth stop reversibly mounted in said stop-support, said tooth stop being vertically adjustable in said stop support.

10. In a saw shaper, the combination of a shaper body, a pair of shaper jaws mounted therein and movable relatively to each other, a. stop-support mounted on said shaper body and having depending flanges, a tooth-stop mounted between said flanges, and screws for vertically adjusting said tooth stop between said flanges.

11. In a saw shaper, the combination of a shaper body, a pair of shaper jaws mounted therein and movable relatively to each other,

a stop-support mounted on said shaper body and having depending flanges, a tooth-stop screws acting on said tooth-stop on oppo-' site sides of said transverse clamping screw, said flanges having slots which receive sa1d clamping screw and are transverse to the plane in which said shaper jaws are relatively movable.

13. In a saw shaper, the combination of pair of a v stop-support shaper body and having depending .5 and a; tooth-stop mou flanges, said. stop-support: being adjustai'lle on said shaper body and movable relatively shape! jaws mountto. each mounted on said nted between said said t00th-st0b being vertically adjustziblehin said stopsupport.

hand at Indianapolis, Indiana, this-29th day of July, A. D. one thousand nine hundred and; twenty-four. i

- J HN F. PRIBNOW.

In Witness whereo i, .I have hereuneo set, 

